My wife and I are considering the multi entry tourist visa. We want to stay 6 months I realize that means a trip out of country. When applying for visa my flight shows 6 months, September through March. Is that a problem? What if I got round trip tickets to Viet Nam inside the first 90 days and used that for departure and arrival Also if I stay at an Airbnb should I get for 90 days or six months? I appreciate any advice. We have ruled out DTV and Retirement OA